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Mechanical key detection chip and mechanical keyboard

A technology for detecting chips and keys, applied in the direction of detecting faulty computer hardware, error detection/correction, faulty hardware testing methods, etc., can solve problems such as high cost and complicated keyboard layout

Pending Publication Date: 2021-07-23
长沙锐逸微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mechanical key detection chip, which aims to solve the problem of "ghosting" of the mechanical keyboard and the problem of key vibration, and integrates LED drive to solve the problem of complex keyboard layout and high cost

Method used

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  • Mechanical key detection chip and mechanical keyboard
  • Mechanical key detection chip and mechanical keyboard
  • Mechanical key detection chip and mechanical keyboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 2 A schematic diagram of the pins of the mechanical button detection chip of the present invention is shown.

[0046] Such as figure 2 As shown, the mechanical button detection chip has the following pins: power supply pin VDD——101, ground pin VSS——102, clock input pin SCK_I——103, clock output pin SCK_O——104, data input pin SDI——105, data output pin SDO——106, light emitting diode 1 driving pin LED1——107, light emitting diode 2 driving pin LED2——108, light emitting diode 3 driving pin LED3——109 and key detection pin Foot CIO - 110.

[0047]In this embodiment, the mechanical key is connected to the CIO pin 110, and the mechanical key detection chip 100 converts the corresponding multi-bit digital value according to the impedance value of the mechanical key. Through the clock input pin SCK_I 103, the data input pin SDI105 and the output pin SDO 106 can control or query the working state of the mechanical button detection chip 100, read the conversion result, co...

Embodiment 2

[0051] image 3 A schematic diagram of the mechanical keyboard of the present invention is shown, in which three mechanical keys, three mechanical key detection chips and a main controller are taken as examples to illustrate the working principle of the mechanical keyboard.

[0052] Such as image 3 As shown, the mechanical button 200 includes a main controller 140, three mechanical buttons 130_1, 130_2, 130_3, three mechanical button detection chips 100_1, 100_2, 100_3; power supplies for the three mechanical button detection chips 100_1, 100_2, 100_3 Pins 101_1, 101_2, 101_3 are connected to system power supply VDD 151; ground pins 102_1, 102_2, 102_3 of three mechanical button detection chips 100_1, 100_2, 100_3 are connected to system ground VSS 150; three mechanical buttons 130_1, 130_2, 130_2 Be respectively connected to the CIO pin 110_1 of the mechanical key detection chip 100_1, the CIO pin 110_2 of 100_2, the CIO pin 110_3 of 100_3; the clock SCK_0 of the main contr...

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Abstract

The invention provides a mechanical key detection chip, the chip can convert the impedance value of a mechanical key into a corresponding digital value, the chip has a cascade expansion function in a scan chain mode, serial expansion use can be facilitated, the chip integrates a light emitting diode drive, and by means of the characteristics, the chip can be applied to the field of mechanical keyboards, and the mechanical keyboards which are efficient, reliable and low in cost are developed.

Description

technical field [0001] The patent of the present invention relates to a chip, and mainly relates to a mechanical button detection chip. Background technique [0002] The current keyboards are mainly divided into membrane keyboards and mechanical keyboards. Mechanical keyboards have the characteristics of high reliability, fast sampling speed, and good hand feeling consistency. Therefore, in the field of high-end keyboards, mechanical keyboards have always been the mainstream. [0003] The current key sampling method of the mechanical keyboard is to use the different conduction impedance when the mechanical key is pressed and lifted to distinguish the key state. After the mechanical key is pressed, the metal contacts are connected together, the key is in a low impedance state, and the controller recognizes the key. After pressing, the mechanical button is lifted, the metal contacts are separated, the button is in a high-impedance state, and the controller recognizes that the ...

Claims

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Application Information

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IPC IPC(8): G06F3/02G06F11/22
CPCG06F3/0219G06F11/2205G06F11/2273
Inventor 谭晓强周国琼蒋仁杰郭斌李俊丰李亚
Owner 长沙锐逸微电子有限公司
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